I mean at the end of Avengers: Age of Ultron, the new SHIELD headquarters is located in upstate New York.

You know what else is in upstate New York? Charles Xavier's School for Giften Youngsters... AKA, the X-Men.

Could a cross over be in the making? I think MARVEL is setting something big up.

However, the details of the exact location of the SHIELD HQ besides the fact that it's in upstate New York is probably classified.

Whereas Xavier's school is at Salem Center, NY. Close to the CT/NY Border, Salem Center is actually a fictional place in New York, however, there is an Old Salem Center rd. in NY. Could the Avenger's new HQ be close? And if so, then according to Agents of Shield, they should be keeping track of people with special abilities.

So it is all possible that Marvel could, in the near future have the X-Men join the Avengers, or at least Wolverine, and it would make perfect sense since both HQs are in New York now, and it's plausible.